The writing process for the majority of Metallicaâs albums have followed the same process. A large slew of guitar riffs written primarily by James Hetfield, sometimes Kirk Hammett, and rarely the bandâs bass player, (that now being bass virtuoso Robert Trujillo) are reviewed and selected.
1 Delhi is most polluted city in the world in PM2.5 concentrations. 2  Half of the top 20 most polluted cities were in India, according to data.  PM2.5 is considered most harmful to health.
Bangalore among top polluted mega cities. Kalyan Ray, New Delhi, Nov28, 2012, DHNS: From the sky, the Garden City of Bangalore now looks more smoggy compared to other mega cities in the subcontinent, thanks to rising levels of tiny soot particles in the atmosphere from vehicle and industrial pollution.